Topsides:
Topsides typically do not interfere with spa
operation. If you lose the ability to push one
button and do not get the action in should call for,
you normally have to replace the whole topside.
There are not repair parts for the topside. If the
complete topside fails all at once, usually you look
at the board to be at fault in the main control box.

These units are
complete and self contained and water resistant.

All the shown topside
above are held in place by double sticky tape. To
remove you cover a wide blade screwdriver, slide in
between topside and spa shell (you covered the blade
to protect the finish). Twist the screwdriver and
the topside normally pops off. Clean and reverse to
add new topside.

If after you turn the
main power on you don't see anything on the topside
readout and the spa doesn't come on, then likely its
a board issue. If there is nothing on the topside
BUT the spa does come on, then good chance it is the
topside.

FYI:The J200 and most J300
series spas have a LED topside. LED have a red glow.
Early J300 and J400 models usually have the LED
topside which have gray numbers and uses a backlit
light to see at night.